Quality Park® catalog mailing envelopes are perfect for shipping, storing or organizing. Heavyweight 28-lb paper withstands extensive handling at home, in the office or on the mail route. These envelopes are perfect for small flat or larger folded documents. A wide, heavily gummed commercial flap seals tight with moisture to keep inserts secure. Center seams give added strength for heavy contents. Store your Quality Park® gummed catalog envelopes in a cool, dry place for impressive longevity. Get stock-up quantities of this never-out envelope essential!